Chemical apparatus



June 20, 1939.

w. 0. GEYER Er AL CHEMICAL APPARATUS Filed Aug. 25, 1957 INVENTORS 4mm O. GEVER ATTORN Y.

Patented June 20, 1939 UNITED STATES PATENT OFFICE CHEMICAL APPARATUS Application August 23,

4 Claims.

This invention relates to chemical apparatus and more particularly to an improved piece of laboratory apparatus made from glass and known in the art as a wash bottle.

In the chemical analysis of materials it is frequently necessary to isolate one of the constituents of the material as a filterable precipitate and to collect this precipitate upon a filter paper in a funnel. It is then necessary to thoroughly wash the collected filtrate and the filter paper to free the same from the fluid soluble filtrate associated with the precipitated constituent. In washing the collected precipitate it is essential to avoid the use of fluids or solutions which react with or dissolve the precipitate or which react with or precipitate the dissolved material remaining in the filtrate. Accordingly the wash fluid or solution will vary widely depending upon the nature of the material being analyzed and the nature of the filtrate and precipitate involved. Many of the wash fluids or solutions employed are vaporizable many others are reactive with atmospheric gases to the detriment of the fluid or of the filtrate and precipitate involved; and others are hygroscopic in nature and absorb undesirable amounts of moisture from the atmosphere.

It is desirable, therefore, to provide a wash bottle in which means are provided to protect the fiuid contents from deleterious absorption of atmospheric gases and vapors and to prevent va- Dorization of the contents during the time intervals between use of the contents for the purposes intended.

One of the objects is to provide an improved 35 wash bottle. Another object is to provide a wash bottle with readily operated means to seal the fluid contents from the air during the period it is not in use but readily unsealed when it is desired to use the contents thereof. Other objects and advantages will be apparent as the invention is more fully disclosed.

In accordance with these objects we have designed an improved wash bottle of which the following, taken in conjunction with the drawing, is a full and complete description. In the drawing Figs. 1, 3 and illustrate one specific embodiment of the present invention and Figs. 2, 4 and 6 illustrate a second specific embodiment of the same.

Fig. 1 is a side elevational View with the top portion partly broken away; Fig. 3 is an enlarged sectional view of the said top portion; and Fig. 5 is an enlarged sectional view further illustrating the same.

Fig. 2 is also a side elevational View with the 1937, Serial No. 160,356

top portion partly broken away to illustrate the diilerence in structure from that illustrated in Fig. 1; Fig. 4 is an enlarged sectional view of the said top portion; and Fig. 6 is an enlarged sectional view further illustrating the same.

Referring to the drawing, the present invention in. its broadest concept contemplates the provision of a stop-cock closure on the open end of the neck of a wash bottle flask of usual type, the said stop-cook providing means in one position 10 of rotation to pass a pressure of air therethrough into the flask upon the surface of fluid contained therein and means to simultaneously permit the discharge therethrough of said fluid from within the flask, and in all other positions of rotation to 15 hermetically seal the interior of the flask from the atmosphere and to render inoperative the above said means.

There are several ways in which this objective may be accomplished. The two most expedient 2 and practical ways are indicated in the drawing Figs. 1, 3 and 5 and Figs. 2, 4 and 6 respectively.

Referring to Figs. 1, 3 and 5, flask I having an elongated or extended tubular neck portion 2, is provided with a flared portion 3 having its inner 2 surface tapered annularly in such manner as to form the female part of a male and female joint or what may be identified as the barrel of a stopcock. Diametrically opposite openings are provided in said barrel and tubular extensions or con- 1 duits 6 and 9 are sealed thereto at the openings.

End closure member 4 provided with a complementary tapered exterior surface adapted to form the male part of the said male and female joint, or as may be more commonly identified as the 35 plug member of the said stop-cock, is seated within the flared end 3 of flask l. The exterior surface of plug 4 is provided with a groove l and a longitudinally extending diametrically opposite bore passageway opening closed by conduit 5 extending through the bottom of the plug l. The upper end of groove 1 is in a position to align with the opening leading to conduit l. The bottom end of groove 1 opens into the interior of flask I. The bottom of conduit 5 extends to ad- 45 jacent the bottom of flask I. In the position shown in Fig. 3, it will be seen that with groove 1 in alignment with conduit 5 a pressure of gas may be applied directly upon the surface of fluid within flask l. The fluid thus acted upon will be '50 forced up conduit 5 and thence out through conduit 9. In any other position of plug 3 in barrel section 3, the interior of the flask l is closed from the atmosphere and the means to apply pressure upon the fluid and the discharge means for the fluid hereinabove described is rendered inoperative.

In the modification illustrated in Figs. 2, 4 and 6, the outer surface of end 3' of neck 2 is shaped to form the male part of a male and female joint rather than the female part as in Fig. 1. End-closure member i is provided with a tapered recess adapted to seat thereon or to receive the tapered male part 3. End-closure member is provided with the diametrically opposite openings into which conduits E and 9' are sealed, and the male part 3' is provided with diametrically opposite openings in a position adapted to simultaneously align with the female part openings upon rotation of the parts relative to each other. Conduit 5 is sealed to and forms an extension of the one of the openings aligning with the fluid discharge conduit 9 and extends to adjacent the bottom of flask l as in 1. The interior surface of end 3 forms substantially an extension of the inner surface of neck 2 and when opening 8 is in alignment with. conduit 6 as indicated in Fig. 4 the application of a pressure of gas through conduit 6 acts directly upon the surface of fluid in flask l. The fluid thus is forced upwardly in conduit 5' and discharged through conduit 9. In any other rotated position of cap or closure member 3 the fluid contents of flask l are sealed from the atmosphere and the means to apply pressure and to discharge fluid are rendered inoperative.

The engaging male and female surfaces of sections S3 and closure members l-d' being com prised of glass and being ground to relatively close fit are not rotatable relative to each other without the disposing of lubricating materials therebetween. Each of these surfaces may be coated with the glaze composition described and claimed in copending application Serial No. 132,045, filed March 20, 1937, assigned to the same assignee as the present application to form a greaseless, non-freezing joint therebetween, or may be coated with a ductile or noble metal as described and claimed in Patent No. 2,083,228, issued June 8, 1937, or as described and claimed in the said above identified copending application, where it is desired to obtain a greaseless joint or to avoid contamination of the fluid in the flask from the lubricants ordinarily employed or where it is desired to avoid corrosion of the said ground surfaces or leakage of the said fluid between the said engaging surfaces.

Having described the present invention and described two modifications of the same, it is apparent that the invention may be widely varied without departure from the same, and all adaptations and modifications are contemplated as may fall within the scope of the following claims.

What is claimed is:

1. A wash bottle for chemical laboratory use, comprising in combination a glass flask provided with a neck integral with the flask and extending vertically above the flask and a glass closure member rotatively closing the open end of said neck, the said neck and the closure member each being provided with opposite openings located aligned to coincide in one position of rotation of said closure member on the neck to provide opposite passageways therethrough from the exterior to the interior of the flask, a tube on the exterior of the wash bottle to conduct air under pressure through one said passageway to the interior of the flask onto the top of fluid contained in said flask and a second tube on the exterior of the bottle and extending downwardly towards the bottom of the flask to conduct fluid from the bottom of the flask to the other said passageway and a third tube on the exterior of said bottle to conduct the fluid delivered to the other said passageway by said second tube to a point remote from the bottle, the remote end of said third tube being provided with an opening of restricted diameter.

2. A wash bottle for chemical laboratory use, comprising in combination a glass flask provided with a glass neck integral therewith and extending vertically above the flask and a glass closure member for the end of said neck, the end of the neck and the said closure member each being provided with complementary shaped annular ground surfaces providing rotative engagement of the closure member with said neck in a male and female joint, opposite openings in the neck and closure members located in the two said ground surfaces, said openings being aligned to coincide in one rotative position of the closure member on said neck to provide oppositely located passageways through the neck and closure member from the exterior to the interior of the flask, a tube on the exterior of the wash bottle connected. to one pair of said aligned openings to provide for the application of air under pressure from the exterior of the flask through said aligned openings into said flask onto the top of fluid contained in the flask, a second tube on the interior of the wash bottle and extending downwardly towards the. bottom of the flask to conduct fluid under pressure to the other said aligned openings, and a third tube on the exterior of the bottle to conduct the fluid delivered to said other aligned openings by said second tube to a point remote from the bottle, the remote end of said third tube being provided with an opening of restricted diameter.

3. A wash bottle for chemical laboratory use, comprising in combination a glass flask having a tubular glass neck integral therewith and extending vertically above the flask, said neck terminating in a ground and tapered surface forming the male section of a male and female joint, and a glass closure member for the end of said neck, said closure member being provided with a complementary shaped ground and tapered recess forming the female section of said male and female joint, the said male and female sections of said joint each being provided with opposite openings aligned to coincide in one position of rotation of said closure member on said neck to provide oppositely located passageways through the neck and closure member from the exterior to the interior of the said flask, a conduit having one end sealed to the outer surface of said closure member about one said opening therein and the other end extending a distance away from the said member, a conduit having one end sealed to the outer surface of said closure member about the opposite opening therein and extending a distance away from the said member with the remote end terminating in an opening of restricted diameter, and a conduit sealed to the inner surface of said neck about the opening therein aligning with the opening to which the last mentioned conduit of said closure member is sealed, said conduit extending downwardly through said neck to adjacent the bottom of said flask.

4. A wash bottle for chemical laboratory use, comprising in combination, a glass flask having a tubular glass neck integral therewith and eX- tending vertically above the flask, said neck terminating in a ground and tapered surface forming the female section of a male and female joint and a glass closure member for the end of said neck, said closure member being provided with a complementary shaped annular ground and tapered surface forming the male section of said male and female joint, the said male and female sections of said joint being provided with opposite openings therethrough aligned to coincide in one positon of rotation of said closure member on said neck to provide oppositely located passageways through the neck and closure member from the exterior to the interior of the flask, a conduit having one end sealed to the outer surface of said neck about one said opening and the other end extending a distance away from said neck, a conduit having one end sealed to the outer surface of said neck about the opposite said opening and extending a distance away from said neck, the remote end terminating in an opening of restricted diameter, and a conduit sealed to said closure member about the opening therethough aligning with the last mentioned conduit on said neck said conduit extending downwardly in the said neck adjacent the bottom of said flask.

WILLIAM O GEYER. HERMANN A. HEYN.

CERTIFICATE OF CORRECTION.

Patent No. 2,16 555. June 20, 19 9.

WILLIAM O. GEYER, ET AL.

It is hereby certified that error appears in the printed specification.

of the above vnumbered patent requiring correction as follows: Page 2, first column, line 75, claim 1, for the word "exterior" read interior and that the said Letters Patent shouldjie read with this correction therein that the same may conform to the record of the case in the Patent Office. I

Signed and sealed this 1st day of August, A. D. 1959. I

Henry Van Arsdale (Seal) Acting Commissioner of Patents; 

